Co-salen仿酶系统降解木素模型物的研究机理  

Co-salen Biomimetic Degradation Mechanism of Polymeric Guaiacyl-type Lignin Model Compound

作　　者：邓日灵[1] 周学飞[1] 朱正良[1] 

机构地区：[1]昆明理工大学省高校制浆造纸工程研究中心,云南昆明650224

出　　处：《造纸科学与技术》2008年第3期13-17,共5页Paper Science & Technology

基　　金：国家自然科学基金(20766002);云南省自然科学基金(2005B0014M);云南省教育厅科学研究基金(5Y0681D);华南理工大学制浆造纸工程国家重点实验室科学基金(200629);昆明理工大学分析测试基金(重点项目)资助项目

摘　　要：采用FTIR、1H-NMR、13C-NMR、31P-NMR、HMBC研究了β-O-4型愈创木基木素模型聚合物在Co-salen仿酶体系中的降解机理,结果显示经仿酶处理后,木素模型聚合物β-O-4联接发生断裂,醇羟基含量增加,有利于木素的碎片化和溶出;醚化和苯环开环反应使酚羟基含量下降。Co-salen仿酶处理中,木素模型聚合物甲氧基含量增加,可能与小分子产物烷氧基化联接有关。Co-salen仿酶系统催化氧化酚型木素模型聚合物,产生含羧基的产物。The structural changes of polymeric lignin model compound were studied during Co-salen biomimetic treatment by FTIR, ^1H - NMR, ^13C - NMR, ^31P- NMR and HMBC. It was found that the main ways of polymeric lignin model compound degradation were involved with β - O -4 cleavage and ring-opening reaction. Some phenolic hydroxyls were etherified and aliphatic hydroxyl was increased. The methoxyl increment was possibly related to alkoxylation linkage of small molecular degraded product. The carboxyl-containing products were also produced during Co-salen biomimetic treatment of polymeric lignin model compound.

关 键 词：木素模型聚合物 β-O-4联接 Co-salen 仿酶降解 

分 类 号：TQ324.9[化学工程—合成树脂塑料工业] TQ929[轻工技术与工程—发酵工程]